EP2497988B1 - Insulation cassette for thermal insulation of elongated elements - Google Patents

Insulation cassette for thermal insulation of elongated elements Download PDF

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Publication number
EP2497988B1
EP2497988B1 EP12158721.6A EP12158721A EP2497988B1 EP 2497988 B1 EP2497988 B1 EP 2497988B1 EP 12158721 A EP12158721 A EP 12158721A EP 2497988 B1 EP2497988 B1 EP 2497988B1
Authority
EP
European Patent Office
Prior art keywords
cassette
insulation
reflection elements
elements
cassette part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP12158721.6A
Other languages
German (de)
French (fr)
Other versions
EP2497988A1 (en
Inventor
Peter Fahrenholz
Rainer Blocksdorff
Michael Chrobok
Peter Nowakowski
Günther Ahlers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kaefer SE and Co KG
Original Assignee
Kaefer Isoliertechnik GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kaefer Isoliertechnik GmbH and Co KG filed Critical Kaefer Isoliertechnik GmbH and Co KG
Publication of EP2497988A1 publication Critical patent/EP2497988A1/en
Application granted granted Critical
Publication of EP2497988B1 publication Critical patent/EP2497988B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/08Means for preventing radiation, e.g. with metal foil
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00Adjustable joints, Joints allowing movement
    • F16L27/12Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement
    • F16L27/127Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement with means for locking the longitudinal adjustment or movement in the final mounted position
    • F16L27/1275Adjustable joints, Joints allowing movement allowing substantial longitudinal adjustment or movement with means for locking the longitudinal adjustment or movement in the final mounted position by means of at least an external threaded bolt
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/14Arrangements for the insulation of pipes or pipe systems
    • F16L59/16Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
    • F16L59/161Housings for valves, tee pieces, or the like
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/14Arrangements for the insulation of pipes or pipe systems
    • F16L59/16Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
    • F16L59/163Branch units ; Insulation forming a whole with branches
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00Thermal insulation in general
    • F16L59/14Arrangements for the insulation of pipes or pipe systems
    • F16L59/16Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
    • F16L59/21Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for expansion-compensation devices
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/12All metal or with adjacent metals
    • Y10T428/12326All metal or with adjacent metals with provision for limited relative movement between components
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/19Sheets or webs edge spliced or joined
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24008Structurally defined web or sheet [e.g., overall dimension, etc.] including fastener for attaching to external surface

Definitions

  • the invention relates to an insulation cassette for the thermal insulation of elongate elements with a multilayer insulation of flat reflection elements, each layer of insulation having at least two planar reflection elements which overlap at their ends facing each other at least partially, a plurality of sliding guides are in an overlap region between a first cassette part and a second cassette part arranged, and the sliding guides have a slot in which a bolt is slidably guided.
  • Such insulation cartridge is from the DE 25 21 136 A1 known.
  • the bolt extends through the inner and outer boundary plates and all the reflective plates of the cassette parts.
  • each layer of insulation having at least two planar reflection elements which overlap at their ends facing each other at least partially.
  • Insulation cassettes also referred to as reflective metal insulation or all-metal insulation, are used for the thermal insulation of pipelines.
  • such insulation cassettes are used for the isolation of cooling water pipes of nuclear power plants. Because of the multilayer arrangement of the flat reflection elements made of reflection metal foils, a good insulation effect is obtained, especially at high temperatures. Typical work areas for such insulation cassettes in nuclear power plants are temperature ranges up to about 350 ° Celsius.
  • the isolation cassettes can be prefabricated accurately to a certain extent, so that on site during assembly pieces of fittings must be made to adapt to the actual lengths required to measure. Therefore, for example, to compensate for thermal expansion, insulating cassettes are used in a shiplap arrangement to allow for a required linear expansion. Problem with these stepped cassettes, however, is that sometimes open gaps occur. These gaps are susceptible to interference and also worsen the insulation.
  • the problem underlying the invention is therefore to provide an insulation cartridge with which can make length adjustments without a deterioration of the insulation effect.
  • the bolt is firmly connected to the enclosure of the second cassette part and extends through the first cassette part associated slot, wherein the bolt, starting from the enclosure of the second cassette part to the outside the slot assigned to the first cassette part extends, and the slot is associated with the envelope of the first cassette part.
  • a displacement of the planar reflection elements of a layer relative to one another can take place without a gap opening up. It is thus in the overlap a length adjustment as compensation for thermal expansion of the material or to provide the desired length as a fitting possible without deteriorating by Auftun columns the insulating properties of the insulation cartridge.
  • the flat reflection elements are metal foils, preferably of stainless steel, VA steel, in particular austenitic steel.
  • metal foils have good reflection properties for radiation.
  • stainless steel, VA steel, especially austenitic steel is corrosion resistant and resistant and, moreover, has a poor thermal conductivity, which improves the insulating properties. With lower demands on the material but also the use of aluminum foil is possible.
  • the flat reflection elements are arranged concentrically, in particular with a radial distance of 4 to 15 mm, preferably from 6 to 10 mm.
  • This concentric arrangement allows a plurality of layers of the planar reflection elements around a component to be insulated, in particular a pipeline. By maintaining uniform distances of the reflection elements to one another results in a homogeneous insulation effect.
  • planar reflection elements have spacers, preferably studs, which are produced in particular on both sides of the reflection elements, preferably by means of controlled deformation of the reflection elements.
  • spacers in particular knobs, allow a uniform adjustment of the distance of the reflection elements to each other.
  • adjacent reflection elements only come into contact with each other at specific points in the region of the spacers, so that here, with respect to the surface, no appreciable deterioration of the insulation effect occurs.
  • reflection elements with spacers are arranged alternately successively alternately with reflection elements without spacers, respectively. This results in a simple structure and a simple Assembly, since the adjacent reflection elements can each be moved against each other for mounting. In addition, no problems can occur during assembly by hooking the spacers of two adjacent flat reflective elements.
  • an outer shell which has a plurality of shell parts, wherein preferably axially and / or tangentially adjacent shell parts by means of a sliding guide axially and / or tangentially against each other.
  • a sliding guide axially and / or tangentially against each other.
  • the shell parts can have snap closures, in particular tension closures, for connecting the shell parts to one another and / or with axially and / or tangentially adjacent isolation cassettes.
  • an element to be insulated such as a pipeline, can be provided with insulation quickly and easily with prefabricated shell parts of an insulation system.
  • at any point for maintenance and repair purposes at any time opening and reclosing of the insulation system is possible.
  • the second cassette part has a receptacle for a branch of a pipe system. In this way, a length adjustment in the range of branches is easily possible.
  • the first cassette part and / or the second cassette part has on its cover a projection and / or fold for guiding the other cassette part, a simple assembly and a secure guide against each other in length changes can be achieved. It is particularly advantageous in this case if the projection and / or the fold has a height which corresponds approximately to half the guide length of the sliding guide, in particular is slightly larger. In this way, a reliable guidance of the cassette parts to one another during assembly or length changes over the entire or at least almost the entire guide length of the sliding guide is ensured.
  • Another advantage of the invention relates to the use of an insulation cartridge according to the invention as a compensation element for equalizing thermal Length changes and / or as fitting part for variable length adjustment during assembly. In this way, a length adjustment can be made if necessary simply and without deterioration of the insulation.
  • Another advantage of the invention results from the use of an insulation cartridge according to the invention for the insulation of pipelines, in particular of cooling water pipes of nuclear power plants, preferably in the region of branches. This results in a stable and durable insulation with a long service life, good insulation properties and good adaptability to changes in length.
  • Fig. 1 shows an insulating system 10 in a perspective view as an embodiment of the invention.
  • the insulating system 10 has an insulating cassette 11, to which an insulating cassette 12 is disposed in each case adjacent in the axial direction.
  • the insulating cassettes 12 are in the embodiment shown known Ganzmetallisolierkassetten, in which in a housing is arranged in each case a multi-layer insulation of reflection metal foils.
  • the insulating cassette 11 has in the embodiment shown a first cassette part 13 and a second cassette part 14, which are mutually displaceable in the axial direction, as will be explained in more detail below.
  • the first cassette part 13 has in the embodiment shown two cassette sub-elements 15, 16, while the second cassette part 14 similarly has two cassette sub-elements 17, 18.
  • the cassette sub-elements 15 and 16 or 17 and 18 are connected to each other with quick-release fasteners, in the illustrated embodiment with clamping closures 19.
  • the cassette sub-elements 15 to 18 with the adjacent insulating cassettes 12 are each likewise connected to quick-release closures, namely with clamping closures 19.
  • a plurality of sliding guides 20 are arranged in an overlapping area between the first cassette part 13 and the second cassette part 14.
  • a total of four sliding guides can be seen, of which, however, only two sliding guides 20 are provided with a reference numeral.
  • Fig. 2 shows the section A - A of Fig. 1
  • the cassette sub-elements 16, 18 are each constructed similarly from several layers of flat reflection elements 21, 22.
  • the planar reflection elements in the illustrated embodiment are metal foils 21, 22, namely stainless steel foils.
  • the metal foils 21 have a plurality of alternately arranged nubs 23 and are thus designed as nubbed foil 21.
  • the metal foils 22 are each made plan.
  • the nubbed sheets 21 and the planar sheets 22 are alternately arranged adjacent to each other.
  • the foils 21, 22 of the cassette sub-elements 16, 18 overlap each other.
  • the foils 21, 22 are welded at their end facing away from the region 24 in each case with a shell of the cassette sub-elements 16, 18 by means of a plurality of welds 25, of which in the figure, for better clarity, only two Welding points 25 are provided with a reference numeral.
  • the nubs 23 serve to produce a defined air gap 26 between adjacent metal foils 21, 22.
  • Fig. 3 shows a sliding guide 20 according to detail z of Fig. 1 , As can be seen from the figure, the sliding guide 20 has a slot 27 in which a pin 28 is slidably guided.
  • the bolt 28 is in the embodiment shown, a threaded bolt 28, on which a nut 29 is screwed under the support of a washer 30.
  • Fig. 4 shows an enlarged partial view in the region of the sliding guide 20 according to detail y of Fig. 2 , How the 3 and 4 can be removed, the bolt 28 is fixedly connected to the enclosure of the cassette sub-element 18 and extends through the slot 27. Against a stepping out of the slot 27, the bolt 28 is secured by means of the washer 30 and the nut 29, wherein an accidental release of the nut 29 can be reliably prevented from the threaded bolt 28 by a welding point at the junction between the nut 29 and the bolt 28.
  • the displacement range of the maximum length adjustment of the insulating cassette 11 by moving the cassette sub-elements 16, 18 against each other is limited by the length of the elongated hole 27, as in the Fig. 3 indicated by a double arrow.
  • Fig. 5 shows in a schematic exploded view, the cassette sub-elements 15, 16, 17, 18 in a manner removed from each other.
  • the nubbed foils 21 protrude from the enclosure in the cassette subelements 15, 16. In this way, it is ensured that when moving the cassette sub-elements 15, 16 against the cassette sub-elements 17, 18, no state is reached in which no overlapping of adjacent foils takes place in the area 24.
  • the projection of the insulating films 21, 22 on the cassette sub-elements 15, 16 a simpler insertion into the cassette sub-elements 17, 18 possible.
  • the cassette subelements 16, 18 have at their ends facing the cassette subelements 15, 17 respective folds 31 which serve as guides for the cassette subelements 15, 17 in the installed state and also the formation of a gap between the cassette subelements 15, 17 and the cassette sub-elements 16, 18 each prevent.
  • Fig. 6 shows a front view of the cassette sub-element 16. For clarity, only three metal foils 21, 22 are shown in the figure. As the figure shows, folds 31 are provided on opposite sides of the cassette sub-element 16. During assembly, a cassette sub-element 16 associated cassette sub-element 15 can be easily arranged on the cassette sub-element 16 and is held and guided by the folds 31 reliably and safely until the fastening of the fasteners 19. It is to be noted at this point that for small diameter of the insulating cassette 11 can be dispensed with the use of nubbed sheet 21. In this case, a plurality of layers of concentrically arranged metal foils 22 alone can be used, since then the inherent rigidity of the metal foil 22 is sufficient for setting a defined layer spacing.
  • Fig. 7 shows an enlarged partial view of the connecting portion of the metal foils 21, 22 with the enclosure of the cassette sub-element 16.
  • the metal foils 21, 22 at the connection end each U-shaped bent and by means of welds 32 with the enclosure of the cassette sub-element 16 respectively connected. In this way, serve the U-shaped bent ends of the metal foils 21, 22 on the one hand to secure attachment and on the other hand as spacers.
  • the individual layers of the metal foils 21, 22 and the enclosure are each formed in layers overlapping.
  • the individual layers of the metal foils 21, 22 of the envelope can slide on each other.
  • the maximum adjustment is limited by the leadership of the bolt 28 in the slot 27.
  • FIG. 8 shows an upper part of an insulating cassette 33 in a partially cutaway perspective view as a further embodiment of the invention.
  • FIG. 9 shows a bottom part of the insulating cassette 33 similar in appearance Fig. 8 , The same elements bear the same reference numerals as in the insulating cassette 11th
  • the insulating cassette 33 has a first cassette part 34 and a second cassette part 35.
  • the construction of the cassette parts 34, 35 essentially corresponds to that of the cassette parts 13, 14.
  • the first cassette part 34 has two cassette elements 36, 37 and the second cassette part 35 has two cassette elements 38, 39.
  • the cassette elements 38, 39 each have holders 40, 41, which together form a receptacle for a branch of a pipeline in the assembled state.
  • the cassette elements 36, 37 each have an enclosure 42, which envelop the planar reflection elements, namely the metal foils 21, 22.
  • sliding guides 20 are arranged, which already above have explained components and have the above-described operation.
  • the cassette elements 37, 39 sliding guides 20 are also arranged, which in the Fig. 9 but not visible.
  • the two parts of the isolation cassette 33 in the region of a branch are placed on each other so that the receptacles 40, 41 of the cassette elements 38, 39 together form a receptacle for receiving the branching pipe part.
  • the folds 31 and the projections 43 each form a guide for facilitating the insertion of the cassette member 39 into the cassette member 36. Because of the sliding guides, the insulating cassette 33 need not be exactly matched in their dimensions to the position of the branch. Rather, it is sufficient if the dimensional accuracy is given so far that the deviations are in the range of what can be compensated with the sliding guide 20.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Insulation (AREA)

Description

Die Erfindung betrifft eine Isolationskassette zur thermischen Isolierung langgestreckter Elemente mit einer mehrlagigen Isolation aus flächigen Reflexionselementen, wobei jede Lage der Isolation mindestens zwei flächige Reflexionselemente aufweist, die an ihren einander zugewandten Enden mindestens teilweise überlappen, mehrere Schiebeführungen sind in einem Überlappungsbereich zwischen einem ersten Kassettenteil und einem zweiten Kassettenteil angeordnet, und die Schiebeführungen weisen ein Langloch auf, in dem ein Bolzen verschiebbar geführt ist.The invention relates to an insulation cassette for the thermal insulation of elongate elements with a multilayer insulation of flat reflection elements, each layer of insulation having at least two planar reflection elements which overlap at their ends facing each other at least partially, a plurality of sliding guides are in an overlap region between a first cassette part and a second cassette part arranged, and the sliding guides have a slot in which a bolt is slidably guided.

Eine derartige Isolationskassette ist aus der DE 25 21 136 A1 bekannt. Hierbei erstreckt sich der Bolzen durch die inneren und äußeren Begrenzungsbleche und alle Reflexionsbleche der Kassettenteile.Such insulation cartridge is from the DE 25 21 136 A1 known. In this case, the bolt extends through the inner and outer boundary plates and all the reflective plates of the cassette parts.

Der US 4,659,601 A ist gemäß der Beschreibungseinleitung zum Stand der Technik ebenfalls eine Isolationskassette gemäß, bei der ein Bolzen sämtliche Schichten der Isolationskassette durchdringt. Hierbei ist von Nachteil, dass durch die Durchführung des Bolzens von der Innenseite der Isolierkassette durch sämtliche Isolierlagen bis zur Außenseite eine Wärmebrücke gebildet wird.Of the US 4,659,601 A According to the description of the prior art also according to an insulation cartridge according to, in which a bolt penetrates all layers of the insulation cartridge. It is disadvantageous that a thermal bridge is formed by the implementation of the bolt from the inside of the insulating cassette through all insulating layers to the outside.

Aus der EP 0 033 487 A1 ist eine Isolationskassette zur thermischen Isolierung langgestreckter Elemente mit einer mehrlagigen Isolation aus flächigen Reflexionselementen bekannt, wobei jede Lage der Isolation mindestens zwei flächige Reflexionselemente aufweist, die an ihren einander zugewandten Enden mindestens teilweise überlappen.From the EP 0 033 487 A1 an insulation cartridge for the thermal insulation of elongate elements with a multi-layer insulation of flat reflection elements is known, each layer of insulation having at least two planar reflection elements which overlap at their ends facing each other at least partially.

Isolationskassetten, die auch als Reflexionsmetallisolierung oder Ganzmetallisolierung bezeichnet werden, finden Verwendung zur thermischen Isolierung von Rohrleitungen. Insbesondere werden derartige Isolationskassetten zur Isolierung von Kühlwasserrohren von Kernkraftwerken verwendet. Wegen der mehrlagigen Anordnung der flächigen Reflexionselemente aus Reflexionsmetallfolien ergibt sich insbesondere bei hohen Temperaturen eine gute Isolierwirkung. Typische Arbeitsbereiche für derartige Isolationskassetten bei Kernkraftwerken sind Temperaturbereiche bis etwa 350° Celsius.Insulation cassettes, also referred to as reflective metal insulation or all-metal insulation, are used for the thermal insulation of pipelines. In particular, such insulation cassettes are used for the isolation of cooling water pipes of nuclear power plants. Because of the multilayer arrangement of the flat reflection elements made of reflection metal foils, a good insulation effect is obtained, especially at high temperatures. Typical work areas for such insulation cassettes in nuclear power plants are temperature ranges up to about 350 ° Celsius.

Wegen der verhältnismäßig großen Temperaturgradienten und der Ganzmetallausführung der Isolierung ergibt sich jedoch ein nicht unerhebliches Problem durch thermische Längenausdehnung. Darüber hinaus können die Isolationskassetten nur bis zu einem bestimmten Maß passgenau vorgefertigt werden, so dass vor Ort bei der Montage Passstücke zum Anpassen an die tatsächlich benötigten Längen auf Maß gefertigt werden müssen. Es werden deshalb beispielsweise zum Ausgleich der thermischen Längenausdehnung Isolierkassetten in Stufenfalzanordnung verwendet, um eine erforderliche Längenausdehnung zu ermöglichen. Problem bei diesen Stufenfalzkassetten ist allerdings, dass mitunter offene Spalte auftreten. Diese Spalte sind störanfällig und verschlechtern zudem die Isolierung.Because of the relatively large temperature gradients and the all-metal design of the insulation, however, there is a significant problem due to thermal expansion. In addition, the isolation cassettes can be prefabricated accurately to a certain extent, so that on site during assembly pieces of fittings must be made to adapt to the actual lengths required to measure. Therefore, for example, to compensate for thermal expansion, insulating cassettes are used in a shiplap arrangement to allow for a required linear expansion. Problem with these stepped cassettes, however, is that sometimes open gaps occur. These gaps are susceptible to interference and also worsen the insulation.

Das der Erfindung zugrunde liegende Problem ist es deshalb, eine Isolationskassette anzugeben, mit der sich ohne eine Verschlechterung der Isolierwirkung Längenanpassungen vornehmen lassen.The problem underlying the invention is therefore to provide an insulation cartridge with which can make length adjustments without a deterioration of the insulation effect.

Das Problem wird dadurch gelöst, dass bei einer Isolationskassette der vorstehend genannten Art der Bolzen fest mit der Umhüllung des zweiten Kassettenteils verbunden ist und sich durch das dem ersten Kassettenteil zugeordnete Langloch erstreckt, wobei sich der Bolzen ausgehend von der Umhüllung des zweiten Kassettenteils nach außen durch das dem ersten Kassettenteil zugeordnete Langloch erstreckt, und das Langloch der Umhüllung des ersten Kassettenteils zugeordnet ist. Auf diese Weise kann bei der Erfindung im Bereich der Überlappung ein Verschieben der flächigen Reflexionselemente einer Lage zueinander erfolgen, ohne dass sich ein Spalt auftun kann. Es ist somit im Bereich der Überlappung eine Längenanpassung als Kompensation für thermische Längenausdehnung des Materials oder zum Bereitstellen der gewünschten Länge als Passstück möglich, ohne dass sich durch Auftun von Spalten die Isoliereigenschaften der Isolationskassette verschlechtert.The problem is solved in that in an insulation cartridge of the aforementioned type, the bolt is firmly connected to the enclosure of the second cassette part and extends through the first cassette part associated slot, wherein the bolt, starting from the enclosure of the second cassette part to the outside the slot assigned to the first cassette part extends, and the slot is associated with the envelope of the first cassette part. In this way, in the invention, in the region of the overlap, a displacement of the planar reflection elements of a layer relative to one another can take place without a gap opening up. It is thus in the overlap a length adjustment as compensation for thermal expansion of the material or to provide the desired length as a fitting possible without deteriorating by Auftun columns the insulating properties of the insulation cartridge.

Eine Weiterbildung der Erfindung zeichnet sich dadurch aus, dass die flächigen Reflexionselemente Metallfolien, vorzugsweise aus rostfreiem Stahl, VA-Stahl, insbesondere Austenit-Stahl, sind. Derartige Metallfolien haben gute Reflexionseigenschaften für Strahlung. Darüber hinaus ist rostfreier Stahl, VA-Stahl, insbesondere Austenit-Stahl, korrosionsbeständig und widerstandsfähig und hat darüber hinaus eine schlechte Wärmeleitfähigkeit, was die Isolationseigenschaften verbessert. Bei geringeren Anforderungen an das Material ist aber auch die Verwendung von Aluminiumfolie möglich.A development of the invention is characterized in that the flat reflection elements are metal foils, preferably of stainless steel, VA steel, in particular austenitic steel. Such metal foils have good reflection properties for radiation. In addition, stainless steel, VA steel, especially austenitic steel, is corrosion resistant and resistant and, moreover, has a poor thermal conductivity, which improves the insulating properties. With lower demands on the material but also the use of aluminum foil is possible.

Bei einer bevorzugten Ausführungsform der Erfindung sind die flächigen Reflexionselemente konzentrisch angeordnet, insbesondere mit einem radialen Abstand von 4 bis 15 mm, vorzugsweise von 6 bis 10 mm. Diese konzentrische Anordnung ermöglicht eine Vielzahl von Lagen der flächigen Reflexionselemente um ein zu isolierendes Bauteil, insbesondere eine Rohrleitung. Durch Einhalten von gleichmäßigen Abständen der Reflexionselemente zueinander ergibt sich eine homogene Isolationswirkung.In a preferred embodiment of the invention, the flat reflection elements are arranged concentrically, in particular with a radial distance of 4 to 15 mm, preferably from 6 to 10 mm. This concentric arrangement allows a plurality of layers of the planar reflection elements around a component to be insulated, in particular a pipeline. By maintaining uniform distances of the reflection elements to one another results in a homogeneous insulation effect.

Eine andere Ausführungsform der Erfindung ist dadurch gekennzeichnet, dass die flächigen Reflexionselemente Abstandshalter aufweisen, vorzugsweise Noppen, die insbesondere beidseitig der Reflexionselemente, bevorzugt mittels kontrollierten Verformens der Reflexionselemente, hergestellt sind. Diese Abstandshalter, insbesondere Noppen, ermöglichen ein gleichmäßiges Einstellen des Abstandes der Reflexionselemente zueinander. Gleichzeitig treten einander benachbarte Reflexionselemente nur punktuell im Bereich der Abstandshalter miteinander in Kontakt, so dass hier, bezogen auf die Fläche, keine nennenswerte Verschlechterung der Isolationswirkung auftritt.Another embodiment of the invention is characterized in that the planar reflection elements have spacers, preferably studs, which are produced in particular on both sides of the reflection elements, preferably by means of controlled deformation of the reflection elements. These spacers, in particular knobs, allow a uniform adjustment of the distance of the reflection elements to each other. At the same time, adjacent reflection elements only come into contact with each other at specific points in the region of the spacers, so that here, with respect to the surface, no appreciable deterioration of the insulation effect occurs.

Es ist dabei von Vorteil, wenn die Reflexionselemente mit Abstandshalter abwechselnd mit Reflexionselementen ohne Abstandshalter jeweils abwechselnd aufeinander folgend angeordnet sind. Dadurch ergibt sich ein einfacher Aufbau und eine einfache Montage, da die einander benachbarten Reflexionselemente jeweils gegeneinander zur Montage verschoben werden können. Außerdem können bei der Montage keine Probleme durch Verhaken der Abstandshalter zweier benachbarter flächiger Reflexionselemente auftreten.It is advantageous if the reflection elements with spacers are arranged alternately successively alternately with reflection elements without spacers, respectively. This results in a simple structure and a simple Assembly, since the adjacent reflection elements can each be moved against each other for mounting. In addition, no problems can occur during assembly by hooking the spacers of two adjacent flat reflective elements.

Eine andere Ausführungsform der Erfindung zeichnet sich dadurch aus, dass eine Außenhülle vorgesehen ist, die mehrere Hüllenteile aufweist, wobei vorzugsweise axial und/oder tangential einander benachbarte Hüllenteile mittels einer Schiebeführung axial und/oder tangential gegeneinander verschiebbar sind. Auf diese Weise können diese axial und/oder tangential gegeneinander verschiebbaren Hüllenteile die ebenfalls axial und/oder tangential gegeneinander verschiebbaren flächigen Reflexionselemente einer jeden Lage abdecken und umhüllen, so dass diese gut gegen Beschädigung geschützt sind. Gleichzeitig wird durch diese Ausführungsform eine Längenanpassung nicht behindert. Die Schiebeführung kann ein Langloch und einen darin geführten Bolzen aufweisen. Eine derartige Schiebeführung ist einfach in der Herstellung und zuverlässig in der Anwendung.Another embodiment of the invention is characterized in that an outer shell is provided which has a plurality of shell parts, wherein preferably axially and / or tangentially adjacent shell parts by means of a sliding guide axially and / or tangentially against each other. In this way, these axially and / or tangentially against each other displaceable shell parts which also axially and / or tangentially against each other movable flat reflective elements of each layer cover and envelop, so that they are well protected against damage. At the same time a length adjustment is not hindered by this embodiment. The sliding guide may have a slot and a bolt guided therein. Such a sliding guide is easy to manufacture and reliable in use.

Es ist auch möglich, dass die Hüllenteile Schnellverschlüsse, insbesondere Spannverschlüsse, zum Verbinden der Hüllenteile miteinander und/oder mit axial und/oder tangential benachbarten Isolationskassetten, aufweisen. Auf diese Weise kann ein zu isolierendes Element, beispielsweise eine Rohrleitung, schnell und einfach mit vorkonfektionierten Hüllenteilen eines Isolationssystems nachträglich mit einer Isolation versehen werden. Zudem ist zu Wartungs- und Reparaturzwecken an beliebiger Stelle jederzeit ein Öffnen und Wiederverschließen des Isolationssystems möglich.It is also possible for the shell parts to have snap closures, in particular tension closures, for connecting the shell parts to one another and / or with axially and / or tangentially adjacent isolation cassettes. In this way, an element to be insulated, such as a pipeline, can be provided with insulation quickly and easily with prefabricated shell parts of an insulation system. In addition, at any point for maintenance and repair purposes at any time opening and reclosing of the insulation system is possible.

Bei einer vorteilhaften Ausgestaltung der Erfindung weist der zweite Kassettenteil eine Aufnahme für eine Abzweigung eines Rohrsystems auf. Auf diese Weise ist eine Längenanpassung auch im Bereich von Abzweigungen einfach möglich.In an advantageous embodiment of the invention, the second cassette part has a receptacle for a branch of a pipe system. In this way, a length adjustment in the range of branches is easily possible.

Wenn der erste Kassettenteil und/oder der zweite Kassettenteil an seiner Umhüllung einen Überstand und/oder Falz zur Führung des jeweils anderen Kassettenteils aufweist, lässt sich eine einfache Montage und eine sichere Führung gegeneinander bei Längenänderungen erzielen. Es ist in diesem Fall von besonderem Vorteil, wenn der Überstand und/oder der Falz eine Höhe hat, die etwa der halben Führungslänge der Schiebeführung entspricht, insbesondere geringfügig größer ist. Auf diese Weise ist eine zuverlässige Führung der Kassettenteile zueinander bei der Montage oder bei Längenänderungen über die gesamte oder zumindest fast die gesamte Führungslänge der Schiebeführung gewährleistet.If the first cassette part and / or the second cassette part has on its cover a projection and / or fold for guiding the other cassette part, a simple assembly and a secure guide against each other in length changes can be achieved. It is particularly advantageous in this case if the projection and / or the fold has a height which corresponds approximately to half the guide length of the sliding guide, in particular is slightly larger. In this way, a reliable guidance of the cassette parts to one another during assembly or length changes over the entire or at least almost the entire guide length of the sliding guide is ensured.

Ein weiterer Vorteil der Erfindung betrifft die Verwendung einer erfindungsgemäßen Isolationskassette als Ausgleichselement zum Ausgleichen thermischer Längenänderungen und/oder als Passteil zur variablen Längenanpassung bei der Montage. Auf diese Weise kann einfach und ohne Verschlechterung der Isolation eine Längenanpassung bei Bedarf vorgenommen werden.Another advantage of the invention relates to the use of an insulation cartridge according to the invention as a compensation element for equalizing thermal Length changes and / or as fitting part for variable length adjustment during assembly. In this way, a length adjustment can be made if necessary simply and without deterioration of the insulation.

Ein anderer Vorteil der Erfindung ergibt sich bei der Verwendung einer erfindungsgemäßen Isolationskassette zur Isolierung von Rohrleitungen, insbesondere von Kühlwasserrohren von Kernkraftwerken, vorzugsweise im Bereich von Abzweigungen. Hierbei ergibt sich eine stabile und durable Isolierung mit hoher Lebensdauer, guten Isoliereigenschaften und guter Anpassungsfähigkeit an Längenänderungen.Another advantage of the invention results from the use of an insulation cartridge according to the invention for the insulation of pipelines, in particular of cooling water pipes of nuclear power plants, preferably in the region of branches. This results in a stable and durable insulation with a long service life, good insulation properties and good adaptability to changes in length.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnungen näher beschrieben. Es zeigen:

Fig. 1
ein Isoliersystem mit den Erfindungsmerkmalen in einer perspektivischen Darstellung,
Fig. 2
den Schnitt A - A von Fig. 1,
Fig. 3
eine Schiebeführung gemäß Detail z von Fig. 1,
Fig. 4
eine Schnittdarstellung der Schiebeführung gemäß Detail y von Fig. 2,
Fig. 5
eine schematische Darstellung der längenvariablen Isolierkassette von Fig. 1 mit voneinander abgenommenen Kassettenteilen,
Fig. 6
eine Vorderansicht eines Kassettenteils von Fig. 5,
Fig. 7
eine vergrößerte Teildarstellung des Kassettenteils von Fig. 6,
Fig. 8
einen oberen Teil einer Isolierkassette in einer teilgeschnittenen perspektivischen Darstellung als ein weiteres Ausführungsbeispiel der Erfindung, und
Fig. 9
einen unteren Teil der Isolierkassette in einer Darstellung ähnlich Fig. 8.
Hereinafter, an embodiment of the invention will be described in more detail with reference to the drawings. Show it:
Fig. 1
an insulating system with the features of the invention in a perspective view,
Fig. 2
the section A - A of Fig. 1 .
Fig. 3
a sliding guide according to detail z of Fig. 1 .
Fig. 4
a sectional view of the sliding guide according to detail y of Fig. 2 .
Fig. 5
a schematic representation of the variable length insulating cassette of Fig. 1 with cassette parts removed from each other,
Fig. 6
a front view of a cassette part of Fig. 5 .
Fig. 7
an enlarged partial view of the cassette part of Fig. 6 .
Fig. 8
an upper part of an insulating cassette in a partially cutaway perspective view as a further embodiment of the invention, and
Fig. 9
a lower part of the insulating cassette in a representation similar Fig. 8 ,

Fig. 1 zeigt ein Isoliersystem 10 in einer perspektivischen Darstellung als ein Ausführungsbeispiel der Erfindung. Wie sich der Figur entnehmen lässt, weist das Isoliersystem 10 eine Isolierkassette 11 auf, an die in Axialrichtung jeweils angrenzend je eine Isolierkassette 12 angeordnet ist. Die Isolierkassetten 12 sind bei dem gezeigten Ausführungsbeispiel bekannte Ganzmetallisolierkassetten, bei denen in einem Gehäuse jeweils eine mehrlagige Isolierung aus Reflexionsmetallfolien angeordnet ist. Fig. 1 shows an insulating system 10 in a perspective view as an embodiment of the invention. As can be seen from the figure, the insulating system 10 has an insulating cassette 11, to which an insulating cassette 12 is disposed in each case adjacent in the axial direction. The insulating cassettes 12 are in the embodiment shown known Ganzmetallisolierkassetten, in which in a housing is arranged in each case a multi-layer insulation of reflection metal foils.

Die Isolierkassette 11 hat bei dem gezeigten Ausführungsbeispiel einen ersten Kassettenteil 13 und einen zweiten Kassettenteil 14, die gegeneinander in Axialrichtung verschiebbar sind, wie nachfolgend noch näher erläutert wird.The insulating cassette 11 has in the embodiment shown a first cassette part 13 and a second cassette part 14, which are mutually displaceable in the axial direction, as will be explained in more detail below.

Der erste Kassettenteil 13 hat bei dem gezeigten Ausführungsbeispiel zwei Kassettenteilelemente 15, 16, während der zweite Kassettenteil 14 auf ähnliche Weise zwei Kassettenteilelemente 17, 18 aufweist.The first cassette part 13 has in the embodiment shown two cassette sub-elements 15, 16, while the second cassette part 14 similarly has two cassette sub-elements 17, 18.

Die Kassettenteilelemente 15 und 16 bzw. 17 und 18 sind miteinander mit Schnellverschlüssen, im gezeigten Ausführungsbeispiel mit Spannverschlüssen 19, verbunden. Auf gleiche Weise sind die Kassettenteilelemente 15 bis 18 mit den angrenzenden Isolierkassetten 12 jeweils ebenfalls mit Schnellverschlüssen, nämlich mit Spannverschlüssen 19, verbunden.The cassette sub-elements 15 and 16 or 17 and 18 are connected to each other with quick-release fasteners, in the illustrated embodiment with clamping closures 19. In the same way, the cassette sub-elements 15 to 18 with the adjacent insulating cassettes 12 are each likewise connected to quick-release closures, namely with clamping closures 19.

Der Figur ist außerdem zu entnehmen, dass in einem Überlappungsbereich zwischen dem ersten Kassettenteil 13 und dem zweiten Kassettenteil 14 mehrere Schiebeführungen 20 angeordnet sind. In der Figur sind insgesamt vier Schiebeführungen zu sehen, von denen allerdings nur zwei Schiebeführungen 20 mit einem Bezugszeichen versehen sind.It can also be seen from the figure that a plurality of sliding guides 20 are arranged in an overlapping area between the first cassette part 13 and the second cassette part 14. In the figure, a total of four sliding guides can be seen, of which, however, only two sliding guides 20 are provided with a reference numeral.

Fig. 2 zeigt den Schnitt A - A von Fig. 1. Wie sich der Figur entnehmen lässt, sind die Kassettenteilelemente 16, 18 jeweils ähnlich aus mehreren Lagen flächiger Reflexionselemente 21, 22 aufgebaut. Im Einzelnen sind die flächigen Reflexionselemente bei dem gezeigten Ausführungsbeispiel Metallfolien 21, 22, nämlich Edelstahlfolien. Dabei weisen die Metallfolien 21 eine Vielzahl wechselweise angeordneter Noppen 23 auf und sind somit als Noppenfolie 21 ausgeführt. Im Gegensatz dazu sind die Metallfolien 22 jeweils plan ausgeführt. Fig. 2 shows the section A - A of Fig. 1 , As can be seen from the figure, the cassette sub-elements 16, 18 are each constructed similarly from several layers of flat reflection elements 21, 22. In detail, the planar reflection elements in the illustrated embodiment are metal foils 21, 22, namely stainless steel foils. In this case, the metal foils 21 have a plurality of alternately arranged nubs 23 and are thus designed as nubbed foil 21. In contrast, the metal foils 22 are each made plan.

Bei dem gezeigten Ausführungsbeispiel sind die Noppenfolien 21 und die planen Folien 22 jeweils abwechselnd einander benachbart angeordnet. In einem Bereich 24 überlappen die Folien 21, 22 der Kassettenteilelemente 16, 18 jeweils miteinander. Wie sich der Figur weiter entnehmen lässt, sind die Folien 21, 22 an ihrem von dem Bereich 24 abgewandten Ende jeweils mit einer Hülle der Kassettenteilelemente 16, 18 mittels einer Vielzahl von Schweißpunkten 25 verschweißt, von denen in der Figur der besseren Übersichtlichkeit halber nur zwei Schweißpunkte 25 mit einem Bezugszeichen versehen sind.In the illustrated embodiment, the nubbed sheets 21 and the planar sheets 22 are alternately arranged adjacent to each other. In a region 24, the foils 21, 22 of the cassette sub-elements 16, 18 overlap each other. As can be seen from the figure, the foils 21, 22 are welded at their end facing away from the region 24 in each case with a shell of the cassette sub-elements 16, 18 by means of a plurality of welds 25, of which in the figure, for better clarity, only two Welding points 25 are provided with a reference numeral.

Wie sich der Figur weiter entnehmen lässt, dienen die Noppen 23 zum Herstellen eines definierten Luftspaltes 26 zwischen einander benachbarten Metallfolien 21, 22.As can be seen from the figure, the nubs 23 serve to produce a defined air gap 26 between adjacent metal foils 21, 22.

Fig. 3 zeigt eine Schiebeführung 20 gemäß Detail z von Fig. 1. Wie sich der Figur entnehmen lässt, weist die Schiebeführung 20 ein Langloch 27 auf, in dem ein Bolzen 28 verschiebbar geführt ist. Der Bolzen 28 ist bei dem gezeigten Ausführungsbeispiel ein Gewindebolzen 28, auf den eine Mutter 29 unter Unterlage einer Unterlegscheibe 30 aufgeschraubt ist. Fig. 3 shows a sliding guide 20 according to detail z of Fig. 1 , As can be seen from the figure, the sliding guide 20 has a slot 27 in which a pin 28 is slidably guided. The bolt 28 is in the embodiment shown, a threaded bolt 28, on which a nut 29 is screwed under the support of a washer 30.

Fig. 4 zeigt eine vergrößerte Teildarstellung im Bereich der Schiebeführung 20 gemäß Detail y von Fig. 2. Wie sich den Fig. 3 und 4 entnehmen lässt, ist der Bolzen 28 fest mit der Umhüllung des Kassettenteilelementes 18 verbunden und erstreckt sich durch das Langloch 27. Gegen ein Heraustreten aus dem Langloch 27 ist der Bolzen 28 mittels der Unterlegscheibe 30 und der Mutter 29 gesichert, wobei ein versehentliches Lösen der Mutter 29 von dem Gewindebolzen 28 durch einen Schweißpunkt an der Verbindungsstelle zwischen der Mutter 29 und dem Bolzen 28 zuverlässig verhindert werden kann. Der Verschiebebereich der maximalen Längenanpassung der Isolierkassette 11 durch Verschieben der Kassettenteilelemente 16, 18 gegeneinander wird durch die Länge des Langloches 27 begrenzt, wie in der Fig. 3 durch einen Doppelpfeil angedeutet. Fig. 4 shows an enlarged partial view in the region of the sliding guide 20 according to detail y of Fig. 2 , How the 3 and 4 can be removed, the bolt 28 is fixedly connected to the enclosure of the cassette sub-element 18 and extends through the slot 27. Against a stepping out of the slot 27, the bolt 28 is secured by means of the washer 30 and the nut 29, wherein an accidental release of the nut 29 can be reliably prevented from the threaded bolt 28 by a welding point at the junction between the nut 29 and the bolt 28. The displacement range of the maximum length adjustment of the insulating cassette 11 by moving the cassette sub-elements 16, 18 against each other is limited by the length of the elongated hole 27, as in the Fig. 3 indicated by a double arrow.

Fig. 5 zeigt in einer schematischen Explosionsdarstellung die Kassettenteilelemente 15, 16, 17, 18 in voneinander abgenommener Weise. Wie sich der Figur entnehmen lässt, treten die Noppenfolien 21 bei den Kassettenteilelementen 15, 16 aus der Umhüllung hervor. Auf diese Weise wird sichergestellt, dass beim Verschieben der Kassettenteilelemente 15, 16 gegen die Kassettenteilelemente 17, 18 kein Zustand erreicht wird, bei dem im Bereich 24 keine Überlappung einander benachbarter Folien mehr stattfindet. Außerdem ist durch das Vorstehen der Isolierfolien 21, 22 über die Kassettenteilelemente 15, 16 ein einfacheres Einschieben in die Kassettenteilelemente 17, 18 möglich. Wie sich der Figur außerdem entnehmen lässt, weisen die Kassettenteilelemente 16, 18 an ihren den Kassettenteilelementen 15, 17 jeweils zugewandten Enden Falze 31 auf, die im montierten Zustand als Führung für die Kassettenteilelemente 15, 17 dienen und zudem die Bildung eines Spaltes zwischen den Kassettenteilelementen 15, 17 und den Kassettenteilelementen 16, 18 jeweils verhindern. Fig. 5 shows in a schematic exploded view, the cassette sub-elements 15, 16, 17, 18 in a manner removed from each other. As can be seen from the figure, the nubbed foils 21 protrude from the enclosure in the cassette subelements 15, 16. In this way, it is ensured that when moving the cassette sub-elements 15, 16 against the cassette sub-elements 17, 18, no state is reached in which no overlapping of adjacent foils takes place in the area 24. In addition, by the projection of the insulating films 21, 22 on the cassette sub-elements 15, 16 a simpler insertion into the cassette sub-elements 17, 18 possible. As can also be seen from the figure, the cassette subelements 16, 18 have at their ends facing the cassette subelements 15, 17 respective folds 31 which serve as guides for the cassette subelements 15, 17 in the installed state and also the formation of a gap between the cassette subelements 15, 17 and the cassette sub-elements 16, 18 each prevent.

Fig. 6 zeigt eine Vorderansicht des Kassettenteilelementes 16. Zur besseren Übersichtlichkeit sind in der Figur nur drei Metallfolien 21, 22 dargestellt. Wie sich der Figur entnehmen lässt, sind Falze 31 an voneinander abgewandten Seiten des Kassettenteilelementes 16 vorgesehen. Bei der Montage kann ein dem Kassettenteilelement 16 zugeordnetes Kassettenteilelement 15 so einfach auf dem Kassettenteilelement 16 angeordnet werden und wird durch die Falze 31 zuverlässig und sicher bis zum Befestigen der Spannverschlüsse 19 gehalten und geführt. Es ist an dieser Stelle darauf hinzuweisen, dass für kleine Durchmesser der Isolierkassette 11 auf die Verwendung von Noppenfolie 21 verzichtet werden kann. In diesem Fall können auch mehrere Lagen konzentrisch angeordneter Metallfolien 22 allein verwendet werden, da dann die Eigensteifigkeit der Metallfolie 22 für das Einstellen eines definierten Lagenabstandes ausreicht. Fig. 6 shows a front view of the cassette sub-element 16. For clarity, only three metal foils 21, 22 are shown in the figure. As the figure shows, folds 31 are provided on opposite sides of the cassette sub-element 16. During assembly, a cassette sub-element 16 associated cassette sub-element 15 can be easily arranged on the cassette sub-element 16 and is held and guided by the folds 31 reliably and safely until the fastening of the fasteners 19. It is to be noted at this point that for small diameter of the insulating cassette 11 can be dispensed with the use of nubbed sheet 21. In this case, a plurality of layers of concentrically arranged metal foils 22 alone can be used, since then the inherent rigidity of the metal foil 22 is sufficient for setting a defined layer spacing.

Fig. 7 zeigt eine vergrößerte Teildarstellung des Verbindungsbereiches der Metallfolien 21, 22 mit der Umhüllung des Kassettenteilelementes 16. Wie sich der Figur entnehmen lässt, sind die Metallfolien 21, 22 am verbindungsseitigen Ende jeweils U-förmig umgebogen und mittels Schweißpunkten 32 mit der Umhüllung des Kassettenteilelementes 16 jeweils verbunden. Auf diese Weise dienen die U-förmig umgebogenen Enden der Metallfolien 21, 22 einerseits zu einer sicheren Befestigung und andererseits als Abstandselemente. Fig. 7 shows an enlarged partial view of the connecting portion of the metal foils 21, 22 with the enclosure of the cassette sub-element 16. As can be seen from the figure, the metal foils 21, 22 at the connection end each U-shaped bent and by means of welds 32 with the enclosure of the cassette sub-element 16 respectively connected. In this way, serve the U-shaped bent ends of the metal foils 21, 22 on the one hand to secure attachment and on the other hand as spacers.

Nachfolgend wird die Wirkungsweise der Isolierkassette 11 anhand der Figuren erläutert. Wie sich beispielsweise Fig. 2 entnehmen lässt, sind in dem Bereich 24 die einzelnen Lagen der Metallfolien 21, 22 und der Umhüllung jeweils lagenweise überlappend ausgebildet. Bei einer Längenanpassung mit der Isolierkassette 11, beispielsweise zur Anpassung an die gewünschte Länge bei der Montage oder zum Ausgleich von thermischen Ausdehnungen, können die einzelnen Lagen der Metallfolien 21, 22 der Umhüllung so aufeinander gleiten. Die maximale Verstellung wird dabei durch die Führung des Bolzens 28 in dem Langloch 27 begrenzt. Mittels der Spannverschlüsse 19 ist die in dem Isoliersystem 10 angeordnete Rohrleitung dabei jederzeit zu Wartungs- oder Reparaturzwecken zugänglich.Hereinafter, the operation of the insulating cassette 11 will be explained with reference to the figures. Like, for example Fig. 2 can be seen, in the region 24, the individual layers of the metal foils 21, 22 and the enclosure are each formed in layers overlapping. In a length adjustment with the insulating cassette 11, for example, to adapt to the desired length during assembly or to compensate for thermal expansion, the individual layers of the metal foils 21, 22 of the envelope can slide on each other. The maximum adjustment is limited by the leadership of the bolt 28 in the slot 27. By means of the fasteners 19 arranged in the insulation 10 pipe is accessible at any time for maintenance or repair purposes.

Fig. 8 zeigt einen oberen Teil einer Isolierkassette 33 in einer teilgeschnittenen perspektivischen Darstellung als ein weiteres Ausführungsbeispiel der Erfindung. Fig. 9 zeigt einen unteren Teil der Isolierkassette 33 in einer Darstellung ähnlich Fig. 8. Gleiche Elemente tragen die gleichen Bezugszeichen wie bei der Isolierkassette 11. Fig. 8 shows an upper part of an insulating cassette 33 in a partially cutaway perspective view as a further embodiment of the invention. Fig. 9 FIG. 12 shows a bottom part of the insulating cassette 33 similar in appearance Fig. 8 , The same elements bear the same reference numerals as in the insulating cassette 11th

Wie sich den Figuren entnehmen lässt, weist die Isolierkassette 33 einen ersten Kassettenteil 34 und einen zweiten Kassettenteil 35 auf. Der Aufbau der Kassettenteile 34, 35 entspricht im Wesentlichen dem der Kassettenteile 13, 14. Dabei hat der erste Kassettenteil 34 zwei Kassettenelemente 36, 37 und der zweite Kassettenteil 35 hat zwei Kassettenelemente 38, 39. Die Kassettenelemente 38, 39 weisen jeweils Aufnahmen 40, 41 auf, die gemeinsam im montierten Zustand eine Aufnahme für eine Abzweigung einer Rohrleitung bilden.As can be seen from the figures, the insulating cassette 33 has a first cassette part 34 and a second cassette part 35. The construction of the cassette parts 34, 35 essentially corresponds to that of the cassette parts 13, 14. The first cassette part 34 has two cassette elements 36, 37 and the second cassette part 35 has two cassette elements 38, 39. The cassette elements 38, 39 each have holders 40, 41, which together form a receptacle for a branch of a pipeline in the assembled state.

Die Kassettenelemente 36, 37 weisen jeweils eine Umhüllung 42 auf, die die flächigen Reflexionselemente, nämlich die Metallfolien 21, 22 umhüllen. Darüber hinaus weisen die Kassettenelemente 36, 37 an die Umhüllung angrenzend und den Kassettenelementen 38, 39 benachbart jeweils Überstände 43 auf. Im Bereich der Überstände 43 sind Schiebeführungen 20 angeordnet, die die vorstehend bereits erläuterten Komponenten aufweisen und die vorstehend bereits erläuterte Funktionsweise haben. Zwischen den Kassettenelementen 37, 39 sind ebenfalls Schiebeführungen 20 angeordnet, die in der Fig. 9 jedoch nicht zu sehen sind. Weiter haben die Kassettenelemente 37, 39 noch den Kassettenelemente 36, 38 zugewandt und diesen im montierten Zustand benachbarte Falze 31.The cassette elements 36, 37 each have an enclosure 42, which envelop the planar reflection elements, namely the metal foils 21, 22. In addition, the cassette elements 36, 37 adjacent to the enclosure and the cassette elements 38, 39 adjacent each supernatants 43. In the region of the projections 43 sliding guides 20 are arranged, which already above have explained components and have the above-described operation. Between the cassette elements 37, 39 sliding guides 20 are also arranged, which in the Fig. 9 but not visible. Next, the cassette elements 37, 39 nor the cassette elements 36, 38 facing and these in the assembled state adjacent folds 31st

Bei der Montage werden die beiden Teile der Isolationskassette 33 im Bereich einer Abzweigung derart aufeinander gesetzt, dass die Aufnahmen 40, 41 der Kassettenelemente 38, 39 gemeinsam eine Aufnahme zum Aufnehmen des abzweigenden Rohrteiles bilden. Dabei bilden die Falze 31 und die Überstände 43 jeweils eine Führung zum Erleichtern des Einführens des Kassettenelementes 39 in das Kassettenelement 36. Wegen der Schiebeführungen muss die Isolationskassette 33 nicht ganz exakt in ihren Abmessungen auf die Position der Abzweigung abgestimmt sein. Es ist vielmehr ausreichend, wenn die Maßhaltigkeit soweit gegeben ist, dass die Abweichungen im Bereich dessen liegen, was mit der Schiebeführung 20 ausgeglichen werden kann.During assembly, the two parts of the isolation cassette 33 in the region of a branch are placed on each other so that the receptacles 40, 41 of the cassette elements 38, 39 together form a receptacle for receiving the branching pipe part. In this case, the folds 31 and the projections 43 each form a guide for facilitating the insertion of the cassette member 39 into the cassette member 36. Because of the sliding guides, the insulating cassette 33 need not be exactly matched in their dimensions to the position of the branch. Rather, it is sufficient if the dimensional accuracy is given so far that the deviations are in the range of what can be compensated with the sliding guide 20.

Im Betrieb durch Temperaturänderungen auftretende Änderungen der Länge des Hauptrohres oder Behälters, von dem ein Rohr abzweigt, lassen sich mit der Schiebeführung auf die vorstehend bereits erläuterte Weise kompensieren. Dabei können einander benachbarte Metallfolien 21, 22 im Bereich Ihrer Überlappung aufeinander gleiten, und so ebenfalls einen Längenausgleich gestatten, ohne dass Schwachstellen in der Isolierung entstehen.Changes in the length of the main pipe or container during operation as a result of temperature changes, from which a pipe branches off, can be compensated with the sliding guide in the manner already explained above. In this case, adjacent metal foils 21, 22 slide on each other in the region of their overlap, and thus also allow a length compensation without causing weak points in the insulation.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

1010
Isoliersysteminsulation
1111
Isolierkassetteinsulating cartridge
1212
Isolierkassetteinsulating cartridge
1313
erster Kassettenteilfirst cassette part
1414
zweiter Kassettenteilsecond cassette part
1515
KassettenteilelementCassette part element
1616
KassettenteilelementCassette part element
1717
KassettenteilelementCassette part element
1818
KassettenteilelementCassette part element
1919
SpannverschlussLever Release
2020
Schiebeführungsliding guide
2121
NoppenfolieNoppenfolie
2222
Foliefoil
2323
Noppeburl
2424
BereichArea
2525
SchweißpunktWeldingSpot
2626
Luftspaltair gap
2727
LanglochLong hole
2828
Bolzenbolt
2929
Muttermother
3030
Unterlegscheibewasher
3131
Falzfold
3232
SchweißpunktWeldingSpot
3333
Isolierkassetteinsulating cartridge
3434
erster Kassettenteilfirst cassette part
3535
zweiter Kassettenteilsecond cassette part
3636
Kassettenelementcassette member
3737
Kassettenelementcassette member
3838
Kassettenelementcassette member
3939
Kassettenelementcassette member
4040
Aufnahmeadmission
4141
Aufnahmeadmission
4242
ÜberstandGot over

Claims (12)

  1. Insulation cassette for the thermal insulation of elongated elements with a multilayer insulation made of flat reflection elements (21, 22), wherein each layer of the insulation has at least two flat reflection elements (21, 22) that overlap at least partly at their ends (24) that face each other, wherein a plurality of pushing guides (20) are arranged in an overlapping area between a first cassette part (13, 34) and a second cassette part (14, 35), and wherein the pushing guides (20) have an elongated hole (27), in which a bolt (28) is moveably guided, characterised in that the bolt (28) is rigidly connected to the shell of the second cassette part (14, 35) and extends through the elongated hole (27) associated with the first cassette part (13, 34), characterised in that the bolt (28), starting from the shell of the second cassette part (14, 35), extends outwards through the elongated hole (27) associated with the first cassette part (13, 34), and the elongated hole (27) is associated with the shell of the first cassette part (13, 34).
  2. Insulation cassette according to claim 1, characterised in that the flat reflection elements are metal foils (21, 22), preferably made of stainless steel, VA steel, in particular austenitic steel.
  3. Insulation cassette according to claim 1 or 2, characterised in that the flat reflection elements (21, 22) are arranged concentrically, in particular with a radial distance of 4 mm to 15 mm, preferably 6 mm to 10 mm.
  4. Insulation cassette according to one of the preceding claims, characterised in that the flat reflection elements (21) have spacers, preferably knobs (23), which are produced in particular on both sides of the reflection elements (21), preferably by means of controlled deformation of the reflection elements (21).
  5. Insulation cassette according to claim 4, characterised in that reflection elements (21) with spacers (23) and reflection elements (22) without spacers (23) are alternately arranged.
  6. Insulation cassette according to one of the preceding claims, characterised in that an outer shell is provided, which has a plurality of shell parts (15-18, 36-39), wherein preferably the axially and/or tangentially adjacent shell parts (15-18, 36-39) can be axially and/or tangentially displaced against one another by means of a pushing guide (20).
  7. Insulation cassette according to claim 6, characterised in that the outer shell parts (15-18, 36-39) have quick-release fasteners, in particular toggle-type fasteners (19), to connect the outer shell parts (15-18, 36-39) together and/or to axially and/or tangentially adjacent insulation cassettes (12).
  8. Insulation cassette according to one of the preceding claims, characterised in that the second cassette part has a receiving part (40, 41) for a branch connection of a pipe system.
  9. Insulation cassette according to one of the preceding claims, characterised in that the first cassette part (13, 34) and/or the second cassette part (14, 35) has a projection (43) and/or a fold (31) on its outer shell (42) for guiding the respective other cassette part.
  10. Insulation cassette according to claim 9, characterised in that the height of the projection (43) and/or the fold (31) corresponds to about half the guide length of the pushing guide (20) and in particular is slightly greater.
  11. Use of an insulation cassette (11, 33) according to one of the preceding claims as a compensating element for compensating longitudinal thermal changes and/or as an adapter for variable length adjustment during assembly.
  12. Use of an insulation cassette (11, 33) according to one of claims 1 to 10 for insulating pipe lines, in particular cooling water pipes of nuclear power plants, preferably in the area of branching connections.
EP12158721.6A 2011-03-10 2012-03-09 Insulation cassette for thermal insulation of elongated elements Not-in-force EP2497988B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011001208 2011-03-10
DE102011001335A DE102011001335A1 (en) 2011-03-10 2011-03-16 Isolation cassette for thermal insulation of elongate elements

Publications (2)

Publication Number Publication Date
EP2497988A1 EP2497988A1 (en) 2012-09-12
EP2497988B1 true EP2497988B1 (en) 2017-07-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP12158721.6A Not-in-force EP2497988B1 (en) 2011-03-10 2012-03-09 Insulation cassette for thermal insulation of elongated elements

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US (1) US8877314B2 (en)
EP (1) EP2497988B1 (en)
DE (1) DE102011001335A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6250945B2 (en) * 2013-03-29 2017-12-20 株式会社修友 Metal reflective heat insulation cover
JP6415245B2 (en) * 2014-10-23 2018-10-31 ニチアス株式会社 Thermal insulation structure and method of use
RU2657385C1 (en) * 2017-02-13 2018-06-13 Акционерное общество "Ордена Трудового Красного Знамени и ордена труда ЧССР опытное конструкторское бюро "ГИДРОПРЕСС" Device for the pipeline modular heat insulation
FR3092642B1 (en) * 2019-02-07 2021-12-31 Framatome Sa Thermal insulation element and assembly comprising such an element
JP6820566B2 (en) * 2019-02-22 2021-01-27 明星工業株式会社 Metal-coated heat insulating structure of small pipe branch and its construction method
JP7489212B2 (en) * 2020-03-31 2024-05-23 明星工業株式会社 Metallic insulation equipment

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3892261A (en) * 1973-01-26 1975-07-01 Babcock & Wilcox Co Insulating conduit
US3904379A (en) * 1974-05-13 1975-09-09 Johns Manville Telescoping reflective thermal insulating structure
DE3003708A1 (en) * 1980-02-01 1981-08-06 Grünzweig + Hartmann Montage GmbH, 6700 Ludwigshafen ALL-METAL THERMAL INSULATION, CONSISTING OF JOINABLE THERMAL INSULATING BLOCKS
US4659601A (en) * 1984-03-12 1987-04-21 The Babcock & Wilcox Company Adjustable multilayer thermal mirror insulation
DE3636341A1 (en) * 1986-10-24 1988-04-28 Gruenzweig & Hartmann Montage Heat-insulating means for industrial heat insulation on equipment, in particular in nuclear installations

Also Published As

Publication number Publication date
EP2497988A1 (en) 2012-09-12
US8877314B2 (en) 2014-11-04
DE102011001335A1 (en) 2012-09-13
US20120231185A1 (en) 2012-09-13

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